Pipe-cutting tool.



N0.746,076:. A PATEN.T.ED-nnc.a,19oa.

I'. A. HEADSON.

` PIPE CUTTING TOOL.

APPLICATION FILED IBBfZI. 1903. N0 MODEL. i 3'8HEBTS-SEBET 1.y

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'4Q No V/ 'Y A PATENTED DBG. 8, 1903.

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PIPE CUTTING T001..

PPLITION FILED FEB. 21, 1903.

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' jme/w71' A UNITED STATES FRANK A. HEADsoN, oF LAFAYETTE, INDIANA,AssIeNoR oF Two-TIIIRDS Patented December 8, 1903. .l I

PATENT OFFICE.A

TO LEO POTTLITZER, POTTLITZER, JULIUS POTTLITZER, AND MAX POTTLITZER,LAFAYETTE, INDIANA.

SPECIFICATION forming peri ef Lettere 'Peteur Ne. 746,076, dated:December s, 1903. Application filed February 21, 19GB. Serial No.1445.483. (No model.)

To all whom it may concern.'

citizen of the United States, residing at Lafayette, in the county ofTippecanoe andState of Indiana, have invented certain new and usefulImprovements in Pipe-Cutting Tools,n

'.fiilly-hereinafterset forth. The rear end of of which the following isa specification.

The invention relates particularly to thatv mechanism for holding thepipe While the cut-l ting-tool is being operated.

Further objects of the' invention will apiv pear from an examination ofthe drawings and the following description and claims.

The invention consists, further and finally, in the features,combinations, and details of construction hereinafterl describedY and 3oclaimed. 7

In the accompanying drawings, Figure lis a side elevation of a portablepipe-cuttingtool madeV in accordance with these improvements; Fig.V 2, aplan view of the'same looking at it from above; Fig. 3, across-sectionalview taken on line 3 of Fig. 'llooking in the direction of thev arrow;Fig. 4, an enlarged elevation, partly in section, of one end of thepipe-cutting tool shown in Figs. l and 2, with 4o the parts arranged incutting position; Fig. 5, an enlarged sectional view of the handle endof the pipe-cutting tool; Fig. 6, an elevation showing theseimprovements when at' tached to a machine-tool, and Fig. 7 an endelevation of the,v samey looking at the parts from the left-hand side ofFig. 6.

- In constructing a pipe-cutting tool in accordance with theseimprovements I make a main-frame portion a, provided with anupwardly-extending jaw b at its front end, the` inner 'surfaceA of whichis curved, as shown 'particularly in"Figs. l and 4. The inner curvedisurfaceof the jaw of this main-frame portion is provided with a set ofantifrictionrolls c, the purpose of which vwill be more the main-frameportion is provided with an upwardly-extending lug d, having a threadedbore therein', the purpose of which will also more fully hereinafterappear.

To rotatably hold the pipe in position, so that it may be out withoutbending either of the ends, and thus avoid forming an objectionable bur,a longitudinally-divided lsecond-frame portion e is provided; This frameportion is made in two parts, as above suggested, held together by meansof rivets or screws f, and at its lower end is slidably 'mounted kupon away on the main-frame portion.' The frontend of the second-frame.portion is `providedwitha grooved antifric tion roll or rolls h, which,in connectionwith the antifriction-,rolls c of the main `t`rameporti'on,`rota'tably holdsvthe pipe i in posi-v tion t'o be out.

k in the second-frame portion and the Ihread-l ed surface of whichengages with the threaded bore in thelug d. The outer end of thisadjusting-screw is provided With an integral knurled handle Z, by whichit may be turned -in onedirection or the other to move the secthe hollowadjusting-screw, as shown particularly in Fig. 4. The outer end of thisfeed-screw is provided with a handle u, by which it may be turnedindependently ofthe adjusting-screw, and thus impart an inde pendentsliding motion to the tool-holding block, with its cutter, so as to movethe same into or out of cutting position without dis turbing in any wayeither or both of the frame portions.

In Figs. 6 and 7 I have shown a modiiication of these ideas as appliedto a machinetool in which the pipe i may be grasped and held in aretaining-chuck. In this modification the main-frame portion is made intwo parts, a part n, which is attached to the bed of the machine w, andthe upwardly-extending jaw 0;, slidably mounted thereon. The main-frameportion is further provided with an integral lug y. The second-frameportion z is in this instance slidably mounted upon the main-frameportion, but outside of the lug, and in that way specifically differentfrom the mechanisms illustrated in Figs. l to 5, inclusive. Both ofthese frame portions 0c and z, as above stated, are slidably mounted onthe main-frame portion and are provided with threaded perforations withwhich the adjusting-screw 8 has a threaded engagement. Thisadjusting-screw has a shoulder portion 9, mounted between the two-partlug y, which prevents longitudinal movement thereof, butduring itsrotation operates to move both of the frame portions, with theirantifriction-rolls c and h, into position to rotatably hold the pipe inposition to be cut. The second-frame portion z is provided with atool-holding block 10, constructed and arranged therein exactly as shownand described in connection with Fig. 4. Instead, however, of having itsfeed-screw 1I passed through the adjusting-screw it passes through thesecond-frame portion and engages the tool-holding block, exactly asshown and described in connection with Fig. 4c.

Frein the foregoing description of the construction and operation itwill be seen that I have provided al machine which effectively holds thepipe rotatably in position-that is, the pipe may be rotated in the toolor the tool may be rotated around the pipe, as occasion requires ornecessity demands, and the desired cut made therein without bendinginwardly either cut end of the pipe, so as to form an objectionable bur,al1 of which will be thoroughly understood andV appreciated by thoseskilled in the art. It will also be seen that the cuttingtool isarranged under and between the two-part antifrictionrolls 7i andsubstantially opposite the rolls c c, all of which serves to hold thepipe in an etticient manner during the cutting operations.

l. In a pipe-cutting tool, the combination ofa frame portion providedwith a jaw having a plurality of bearing-points, a sliding block mountedon such frame provided with roller mechanism, a cutting-tool providedwith a cutting-point mounted between the axial center of such rollermechanism and the bearing-points of the jaw, and means for moving suchcutting-tool independently of the sliding block and roller mechanism,substantially as described.

2. In a pipe-cutting tool, the combination of a frame portion providedwith a rigid jaw having a plurality of bearing-points, a sliding blockmounted on such frame provided with a pair of rollers mounted in axialalinement with each other and movable toward and from the rigid jaw, acutting-tool mounted between such rollers with its cutting-pointintermediate their axial center and the bearing-points of the rigid jawand movable independently ot' the sliding block, and means for movingsuch cutting tool and sliding block independently of each other,substantially as described.

3. In a pipe-cutter of the class described, the combination of amain-frame portion provided with a pair of antifrictionrolls, asecond-frame portion slidably mounted thereon and provided with a secondset of antifrictionrolls to rotatably hold the pipe in position to becut, a hollow screw for moving the second frame into and out ofposition, a pipe-cutter slidably mounted in the second-frame portion,and a threaded screw-rod passed through the hollow screw of thesecond-frame portion for moving the pipe-cutter into and out of cuttingposition independently of the frame, substantially as described.

4. In a pipe-cutter of the class described, the combination of amain-frame portion provided with an upwardly-extending jaw at the frontend carrying a set of antifriction-rolls and with an upwardly-extendinglug, a second-frame portion provided with antifrictionrolls slidablymounted upon the first mainframe portion for rotatably holding the pipein position to be cut, a hollow adjusting-screw engaging thesecond-frame portion and the lug on the main-frame portion for movingsuch second-frame portion into and out of position,

la tool-carrying block slidably mounted in the vsecondframe portion, anda second screw passed through the hollow screw of the sec ond-frameportion and engaging the tool-carrying block for independently movingthe same into and out of cutting position, substantially as described.

5. In a pipe-cutting tool of the class described, the combination of amain-trarne portion provided with an upwardly-extending jaw at its frontend bearing a set of antit'rction-rolls on the inner surface thereof andwith an upwardly-extending lug at its rear end provided with a threadedbore therein, a longitudinally-divided second-frame portion slidablymounted upon the main-frame portion and provided with antifriction-rollmechanism, a hollow adjusting-screw engaging with the second-frameportion and passed through the threaded opening of the lug on IOO IIO

74me I the main-frame portion for movngsneh sec.- with the tool-holdingblock for moving the ond-frame portion into and out of position, a sameindependently of the second-frame por-k tool-hoiding block provided witha outtingtion, substantially as described. toolslidably mounted in thesecond-frame FRANK A. HEADSON.

5 portion, and a feed-screw passed through the Witnesses:

hollow adjnsting-sorew of they second-frame GEO. M. FORESMAN, Jr.,

portion and having threaded engagement] HERBERT S. FELSENTHAL.

